While many phonological patterns target classes of sounds that can be defined phonetically, a large number of patterns in descriptive grammars involve sounds that cannot be easily characterised in phonetic terms. This finding suggests that phonological patterns themselves must be taken into account when learning phonological representations, and that phonological classes may emerge in learning from both phonetic factors (bottom-up) and phonological patterns (top-down). The current work presents a case of a phonetically unnatural class in South Bolivian Quechua that is active in the phonology of the language, and provides experimental support that this class is referred to by speakers’ grammars. While many cases of phonetically unnatural classes have been documented in descriptions of language patterns, in most cases there is little or no evidence that these patterns or classes are represented by speakers as they are described by linguists.

中文翻译：

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语音知识和语音不自然类：科恰班巴克丘亚语中的普通小舌

虽然许多语音模式的目标是可以通过语音定义的声音类别，但描述性语法中的大量模式涉及不容易用语音术语表征的声音。这一发现表明，在学习语音表示时必须考虑语音模式本身，并且语音类别可能会出现在从语音因素（自下而上）和语音模式（自上而下）的学习中。目前的工作展示了南玻利维亚盖丘亚语的一个语音不自然类的案例，该类在语言的音韵学中很活跃，并为该类被说话者的语法所引用提供了实验支持。虽然在语言模式的描述中记录了许多语音不自然类的案例，